Band saw



I c.' E. TANNEWITZ July 6 1926.

lamb SAW ined Jan. 1 9, 1925 11v PEN-TOR ['ar/ 5. Kari/2614 173 A fTORNEYS Patented July 6, 1926.: a i

- Application filed army-1' 1926. Serial no. sazov. 1 i

The main object of this invention is to provide in a band saw an improved brake mechanism whereby the strain, upon the band saw in braking or checking the ma- -chine is minimlzed permitting the quick stopping of the machine.

simple, and durable in operate.

Objects pertaining to structure and easy to details and econo- V j mies of my invention will definitely appear 7 from the detailed description to follow.

invention.

. wheel 3 is mounted on the spindle 4. j The The invention. is clearly defined and pointed out inthe claims. g

A structure embodying the'features of my invention is clearly illustrated in the accompanying drawing forming a part of this application, in which: I p

Fig. 1 is a side elevation of a sawing machine of the band saw type embodying my .Fig. 2is a fragmentary view partiallyin section on a line corresponding to line 2-2 of Fig. 1. v I

Fig. 3 is a fragmentary plan view showin}; details of the operating connections V Fig. 4 is a detail section on a line correspending to line H of Fig. 1. V

V In the-drawing 1 represents the frame of the machine which is provided with an overhanging standard 2 on 'which the; upper wheel of the machine is mounted. The lower driving means for this spindle is not illustrated.

The upper wheel 5 is carried by the spindleG, thebearings 7"of which are mounted 1 for vertical adjustment on the bracket 8. The saw is conventionally shown at 9.

vEach band wheel is provided with a hub 10 constituting the drum of a brake mecha-' nism, the brake shoe llbeing mounted on brake mechanism is ating lever 13. v p

I These brake mechanisms are connected for, simultaneous operation by means of the foot" lever 14 which is pivoted at 15and has an the arm-12 of one of the bearings 7. Each provided with an actuupwardly projecting arm v16 carrying the equalizing bar 17 The wire cable 18 is arranged over this equalizing bar, one end of the cable being connected to the lever 13 of the lowerband wheel brake mechanism and the other being disposed. through a guiding and supporting tube 19 and passedover the A further object .is to provide a mecha-; nism having these advantages which is very breaking of the g saws. Y r I have illustrated'and brake mechanisms.

guide lever or equalizing bar 20 from whence it passes to the brake lever 13, of the upper brake mechanism. a v V Thus V-arr'anged, when. the I foot lever is actuated the brakesare simultaneously applied V r to the band wheels, thus relieving the saw of any stralns as is the casewhere the braking is on one wheel only. This greatly re- "duces breakage and greatly increasesthe life 'tof theband, saws, as wellas eliminating danger to the operatorfmmv unexpected provements in an embodiment which has proven highly satisfactory; I have not attempted to illustrate or describe other emdescribed my bodiments or adaptations as Iybelieve the disclosure made will enable those skilled in the art toembody or adapt my improvement as maybe desired." 7

Having thus describedmy invention what ters' Patent is: a V .1. In a band saw, the combination with a supporting frameand a band'saw, of a pair of saw carrying and driving wheels mounted on said frame, an lndependent "I claim as new and desire to secure by Let-' brake mechanism for each wheel provided in with a brake lever, an actuating lever, fanequalizer bar on said actuating lever, and

.operating' connections for said actuating lever to said brakelevers comprising a wire.

cable connected at'its ends to said brake levers and engaged over said equalizer bar,

there being a guide lever "adjacent the upper brake lever and over which "the cable isarranged, anda' guiding. and supporting tube for the cable disposed between said guide lever and equalizer bar- 2. Ina band saw, the combination with a supporting frame and a ban'd'saw, of a, pa1r. ofsaw carrying and .driving wheels mounted on said frame, an independent brake mechanism .for each wheel provided with'a brake lever, anactuating lever, an equalizer bar on said actuating lever, and operating connectionsfor said actuating lever tosaid'brakelevers i band saw, of a. pair of supporting and driving wheels, each wheel being provided with a brake mechanism, a foot-lever, an equal 'izing bar on said foot lever, and operating connections'for saidv equalizer bar to the 4,. In a band saw, the combination withja 3. In aband saw, the combination with a 'Q; -c c 1,591,247

band saav oifithe saw su pporting; and dnivband sew, saws and driving ing wheel s, each provided with; an inde- Wheels, each providiech WSitIZl iziependent pendent brake mechanism, and a common brakeymeans, andmeans for simultaneously 1 actuating means fer each, brake, mechanism ,a ctuaiting saidbrake means. 7 5 whereby they may "be simultaneously e'n In witness 'Whereef I have hereunto set ganged. v i. hand.

5. In a band saw,'the combination with a CARL 7E. TVANNEWITIZ. 

